Customers will be able to buy stamps, weigh and ship packages, add insurance and delivery confirmation, among other popular post office services, she said.

There won't be any post office boxes, and you won't be able to do money orders or passports. But it should serve most needs of shoppers and mall employees, Marion said.

"It restores a significant level of postal service to Carousel Center," she said.

The idea of putting a mail kiosk inside a business hasn't been tried anywhere in the country before. The postal service will be monitoring the success of the Carousel Center location, to see if it can be implemented in other places.